Shell-shaped orthodontic appliance, orthodontic system, shell-shaped dental appliance, and method for manufacturing the same

Abstract

Each embodiment of the present application provides a shell-shaped orthodontic appliance, an orthodontic system, a shell-shaped dental appliance, and a method for producing the same, which improve the support force and strength of a bite plate in the occlusal direction. The shell-shaped orthodontic appliance includes a shell-shaped body that accommodates teeth, the shell-shaped body being a single-piece molded structure, and a first projection protruding from the occlusal surface of the shell-shaped body in the posterior tooth region is provided in the direction of the opposing jaws to reconstruct the upper and lower jaw occlusal positions, the first projection is provided with auxiliary support portions that lengthen the upper and lower support contours of the first projection, the auxiliary support portions are formed by the buccal surface and / or lingual surface of the first projection being recessed inward or protruding outward, and penetrate the upper and lower support contours of the first projection, and when the shell-shaped body is fitted, the upper and lower support contours of the first projection are supported by the occlusal surfaces of the teeth at their corresponding positions, generating an auxiliary support force that resists deformation of the first projection in the occlusal direction.

Description

Technical Field

[0001] This application is based on a Chinese patent application with application number "202310325789.7" and filing date of March 29, 2023, and a Chinese patent application with application number "202320657561.3" and filing date of March 29, 2023, and claims their priorities. All of its contents are incorporated herein by reference.

[0002] Embodiments of this application relate to the technical field of dental orthodontics, and in particular, to shell-shaped orthodontic appliances, orthodontic systems, shell-shaped dental appliances, and methods for generating the same.

Background Art

[0003] Currently, in the technical field of orthodontics, functional orthodontics is a conventional treatment means for malocclusion symptoms in children and adolescents during the deciduous dentition period and the mixed dentition period. The single bite plate or Twin-Block orthodontic technique is a conventional treatment means.

[0004] Since the development of clear aligner orthodontic appliances, they have been increasingly selected by more and more people due to the advantages of being comfortable to wear, easy to remove, and aesthetic. With the continuous improvement of clear aligner technology, functional clear aligner orthodontics has emerged in people's vision. For example, clear single bite plate orthodontic appliances or clear Twin-Block orthodontic appliances have appeared. For the clear single bite plate orthodontic appliance, a protrusion structure can be designed in the posterior tooth area to open the occlusion and flatten the Spee Curve after wearing, so as to treat mild mandibular retrognathia. For the clear Twin-Block orthodontic appliance, the mesiodistal inclination of two protruding jaw pads guides the mandibular protrusion when the patient bites. The reverse clear Twin-Block orthodontic appliance guides the mandibular retrusion by the mesiodistal inclination of two protruding jaw pads when the patient bites.

[0005] Currently, conventional stealth single-bite plate orthodontic appliances or stealth twin-block orthodontic appliances are often die-cast, and the protruding jaw pads often have a cavity structure. In this way, during the process of use by the patient, the jaw pads deform after multiple bites due to insufficient rigidity or support. If the patient continues to use a deformed orthodontic appliance, (1) the orthodontic force will be insufficient, making it impossible to reach the predetermined occlusal position and subsequent orthodontic steps cannot be performed normally, and (2) the direction of the predetermined force will be changed, causing the teeth to move in the desired direction due to the unwanted force, and ultimately destroying the entire orthodontic plan. On the other hand, the protruding jaw pads of the two cavity structures may be directly bitten and broken by the patient during use, rendering them unusable. In this case, it becomes necessary to re-die-cast and manufacture the stealth orthodontic appliance required by the patient in this step, which leads to increased orthodontic costs, an extended treatment cycle, and the interruption of treatment while the patient waits for the manufacture of a new stealth orthodontic appliance. As a result, the teeth are not constrained by the necessary orthodontic force, which may cause unwanted movement. The subsequent stealth orthodontic appliance may not match the moved teeth, ultimately leading to the restart of orthodontic treatment. Furthermore, given the generation of unwanted forces, buccolingual slippage may occur between the jaw pads during use, preventing the upper and lower jaws from accurately reaching the predetermined occlusal position, thereby causing jaw deviation problems.

[0006] Therefore, it is of great importance to research dental devices that possess the comfortable and convenient characteristics of functional stealth orthodontic appliances while not impairing the orthodontic force of functional orthodontics. [Overview of the project]

[0007] The object of the embodiments of this application is to provide a shell-shaped orthodontic appliance, an orthodontic system, a shell-shaped dental appliance, and a method for producing the same, which improve the support force and strength of the bite plate in the occlusal direction.

[0008] The shell-shaped orthodontic appliance according to the embodiment of the present application includes a shell-shaped body for housing teeth, the shell-shaped body being a single-piece molded structure, the occlusal surface of the shell-shaped body in the posterior tooth region having a first projection that protrudes toward the opposing jaw direction for reconstructing the upper and lower jaw occlusal position, the first projection being provided with auxiliary support portions that lengthen the upper and lower support contours of the first projection, the auxiliary support portions being formed by the buccal surface and / or lingual surface of the first projection being recessed inward or protruding outward, penetrating the upper and lower support contours of the first projection, and when the shell-shaped body is fitted, the upper and lower support contours of the first projection are supported by the occlusal surfaces of the teeth at their respective positions, generating an auxiliary support force that resists deformation of the first projection in the occlusal direction.

[0009] Furthermore, the shell-shaped dental appliance according to the embodiment of the present application includes a first shell-shaped body that accommodates at least partially the maxillary teeth and a second shell-shaped body that accommodates at least partially the mandibular teeth, wherein the first shell-shaped body is included in the shell-shaped orthodontic appliance described in any one of the above items, and a second projection is provided protruding from the occlusal surface of the second shell-shaped body in the posterior tooth region toward the opposing jaw direction, which cooperates with the first projection of the first shell-shaped body to move the mandible in the sagittal direction, and when the mesial surface of the first projection and the distal surface of the second projection interact when the shell-shaped dental appliance is attached, the mandible moves forward to the target occlusal position.

[0010] Furthermore, the orthodontic system according to the embodiment of the present application includes N sets of shell-shaped dental instruments, each of the N sets of shell-shaped dental instruments corresponding to N sequential orthodontic steps, each of the N sets of shell-shaped dental instruments enabling the repositioning of a tooth from the initial layout of the corresponding orthodontic step to the target layout of the corresponding orthodontic step, and the N sets of shell-shaped dental instruments include at least M sets of shell-shaped dental instruments as described in any one of the above claims, where M is 2 or more and less than N.

[0011] Furthermore, the method for producing a shell-shaped dental instrument according to the embodiment of the present application comprises the steps of obtaining the sagittal positional relationship of the upper and lower jaws at the final orthodontic position based on the orthodontic plan, and determining the geometric shapes of a first shell-shaped body and a second shell-shaped body, wherein the occlusal surface of the geometric shape of the first shell-shaped body in the posterior tooth region is provided with a first projection that protrudes toward the opposing jaw direction to guide the sagittal movement of the mandible, and the occlusal surface of the geometric shape of the second shell-shaped body in the posterior tooth region is provided with a second projection that protrudes toward the opposing jaw direction to cooperate with the sagittal movement of the mandible, and the labial and / or buccal surfaces of the first projection are recessed inward or protrude outward. The method includes the steps of: forming an auxiliary support portion, and when the shell-shaped dental appliance is attached, the upper and lower edges of the auxiliary support portion are supported by the occlusal surfaces of the teeth at corresponding positions, generating an auxiliary support force that resists deformation of the first projection in the occlusal direction, and when the mesial surface of the first projection and the distal surface of the second projection interact, the mandible moves forward to a target occlusal position, the target occlusal position being the final orthodontic position obtained based on the orthodontic plan; and manufacturing a shell-shaped dental appliance, comprising the steps of manufacturing the first shell-shaped body and the second shell-shaped body, respectively, based on the geometric shapes of the first shell-shaped body and the second shell-shaped body.

[0012] Furthermore, in the computer-readable storage medium in which a computer program is stored according to the embodiment of the present application, when the computer program is executed by the processor, the method for producing a shell-shaped dental instrument described in any one of the above items is realized.

[0013] The shell-shaped orthodontic appliance, orthodontic system, shell-shaped dental appliance, and method for producing the same according to this application have at least the following beneficial effects compared to the prior art.

[0014] Each embodiment of the present invention solves functional problems such as mandibular retrusion, deep bite, and maxillary protrusion through the first projection structure. Furthermore, the auxiliary support portion provided on the first projection enlarges the outer contour support edge when the upper surface of the first projection contacts the opposing teeth or orthodontic appliance, and the outer contour support edge when the first projection contacts the teeth on the jaw when a shell-shaped orthodontic appliance is attached. This improves the vertical support force of the hollow first projection during the orthodontic process, and the auxiliary support portion improves the bending section modulus resistance of the first projection with its projection or recessed surface, further improving the overall deformation resistance of the first projection. Therefore, in each embodiment of the present invention, by designing the auxiliary support portion, the vertical support force to the upper and lower jaws of the first projection and the deformation resistance in each direction are improved, ensuring the accuracy and stability of the orthodontic effect.

[0015] The orthodontic system according to the embodiment of the present application includes N sets of shell-shaped dental appliances, each set of shell-shaped dental appliances having a geometric shape that gradually repositions the teeth from their initial position to the target orthodontic position, and throughout the orthodontic process, the heights of the first and second protrusions gradually decrease as the orthodontic process progresses, gradually adjusting the positional relationship between the upper and lower jaws, and the N sets of shell-shaped dental appliances adjust the positional relationship between the upper and lower jaws, correct malocclusion, and achieve shaping and orthodontics in a synchronized manner. [Brief explanation of the drawing]

[0016] One or more embodiments are illustrated by the corresponding drawings, and these illustrative descriptions are not limiting to the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements, and unless otherwise specified, the drawings are not limiting to proportions.

[0017] [Figure 1] This is a schematic diagram of the shell-shaped orthodontic appliance in some embodiments of the present invention. [Figure 2] This is a schematic diagram of a shell-shaped orthodontic appliance in the conventional technology. [Figure 3] This is a schematic diagram of the first projection in several embodiments of the present application. [Figure 4] Schematic configuration diagram of a shell-shaped orthodontic appliance in some embodiments of the present application. [Figure 5] Schematic configuration diagram of a first protrusion in some embodiments of the present application. [Figure 6] Schematic configuration diagram of a shell-shaped orthodontic appliance in some embodiments of the present application. [Figure 7] Schematic configuration diagram of a shell-shaped orthodontic appliance in some embodiments of the present application. [Figure 8] Schematic configuration diagram of a shell-shaped orthodontic appliance in some embodiments of the present application. [Figure 9] Schematic configuration diagram of a shell-shaped dental appliance in some embodiments of the present application. [Figure 10] Schematic configuration diagram of a first protrusion and a second protrusion in a shell-shaped dental appliance in some embodiments of the present application. [Figure 11] Schematic configuration diagram of a first protrusion and a second protrusion in a shell-shaped dental appliance in other embodiments of the present application. [Figure 12] Schematic configuration diagram of a shell-shaped dental appliance in some embodiments of the present application. [Figure 13] [[ID=2)8]]Schematic configuration diagram of a first protrusion and a second protrusion in a shell-shaped dental appliance in other embodiments of the present application. [Figure 14] Schematic configuration diagram of an orthodontic system in some embodiments of the present application. [Figure 15] Flowchart of a method for generating a shell-shaped dental appliance in some embodiments of the present application. <( [Figure 16] Schematic configuration diagram of an initial digital dental model in a method for generating a shell-shaped dental appliance in some embodiments of the present application. [Figure 17] Schematic diagram of a graphics processor according to an embodiment of the present application.

Mode for Carrying Out the Invention

[0018] To clarify the purpose, technical solutions, and advantages of the embodiments of this application, each embodiment is described below in detail with reference to the drawings. However, those skilled in the art will understand that many technical details are presented in each embodiment of this application to help the reader better understand the application. However, the technical solutions claimed for the protection of this application can be realized without these technical details or the various changes and modifications based on the embodiments below. The classification of each embodiment below is for the sake of clarity and should not constitute any limitation on the specific implementation of this application, and each embodiment may be referenced in combination with one another as long as it does not contradict the other.

[0019] In each embodiment of this application, the "posterior tooth region" includes premolars and molars, based on the definition of tooth types in pages 36-38 of the second edition of "Introduction to Oral Medicine" published by Peking University Medical Press, and corresponds to teeth 4-8 in the "Federation Dentaire Internationale (FDI)" notation, while the anterior tooth region corresponds to teeth 1-3 in the FDI notation. The teeth in the anterior tooth region include central incisors, lateral incisors, and canines. Furthermore, regarding teeth in the deciduous stage, the "posterior tooth region" includes three types of teeth, deciduous incisors, deciduous canines, and deciduous molars, based on the definition of deciduous tooth types in pages 40-41 of the second edition of "Introduction to Oral Medicine" published by Peking University Medical Press. Deciduous incisors include deciduous central incisors and deciduous lateral incisors, and deciduous molars include the first and second deciduous molars.

[0020] The shell-shaped orthodontic appliances, orthodontic systems, and shell-shaped dental appliances in each embodiment of the present application can achieve shaping and orthodontics synchronously, solving the problem in the prior art in which the orthodontic effect is affected by the patient's excessive biting force or by deformation of the jaw pad structure due to wear during use.

[0021] Therefore, to solve the above problems, the present application provides a shell-shaped orthodontic appliance, and as shown in Figure 1, in some embodiments, the entire shell-shaped orthodontic appliance is a one-piece molded structure. In some embodiments, the shell-shaped orthodontic appliance includes a shell-shaped body 1 that accommodates teeth, and the shell-shaped body 1 has a plurality of tooth-accommodating cavities 11. In some embodiments, the shell-shaped body 1 is a one-piece molded structure. In some embodiments, the plurality of tooth-accommodating cavities 11 enclose all teeth in the jaw when the shell-shaped orthodontic appliance is fitted. On the occlusal surface of the shell-shaped body 1 in the posterior tooth region, a first projection 12 is provided projecting toward the opposing jaw direction to reconstruct the maxillofacial occlusal position, and after fitting the shell-shaped orthodontic appliance, the height of the first projection 12 satisfies the requirement to maintain the maxillofacial occlusal relationship in the occlusal position of the incisal edges of the anterior teeth. Furthermore, the first projection 12 is provided with an auxiliary support portion 121 that extends the upper and lower support contours of the first projection 12. In some embodiments, the auxiliary support portion 121 is formed by the buccal surface and / or lingual surface of the first projection 12 being recessed inward or protruding outward, and penetrates the upper and lower support contours of the first projection 12. That is, the auxiliary support portion 121 extends from the upper edge of the first projection 12 to the lower edge of the first projection 12. When the shell-shaped body 1 is attached, the upper and lower support contours of the first projection 12 are supported by the occlusal surfaces of the teeth at their corresponding positions, generating an auxiliary support force that resists deformation of the first projection 12 in the occlusal direction.

[0022] In each embodiment of the present invention, the upper edge of the first projection 12 and the upper end edge of the auxiliary support portion 121 are both upper support contour edges 121a that are adjacent to or in contact with the first projection on the opposing jaw side, and the lower edge of the first projection 12 and the lower end edge of the auxiliary support portion 121 are both lower support contour edges 121b that are adjacent to or in contact with the first projection 12 on the jaw when the shell-shaped orthodontic appliance is attached.

[0023] As shown in Figure 2, in the conventional method, the design of the first projection is mainly a single projection block that protrudes from the posterior tooth region of the shell-shaped orthodontic appliance toward the opposing jaw, and the upper and lower edges of the projection block have a roughly rectangular structure. Therefore, when the projection block in the conventional method is used, in the occlusal direction, the support of the projection block to the opposing teeth and the teeth of the main jaw is mainly provided by the upper and lower edges of the projection block.

[0024] In each embodiment of the present application, as shown in Figure 3, the design of the auxiliary support portion 121 in the present application causes the upper edge and lower edge of the first projection 12 to change from the original substantially rectangular shape to a substantially fishbone shape with upper support contour side 121a and lower support contour side 121b of the projection. Compared to the prior art, the support sides of the first projection 12 with the auxiliary support portion 121 in each embodiment of the present application are made longer in the occlusal direction and / or vertical direction, thereby improving the support force of the first projection 12 in the occlusal direction or vertical direction during use, and avoiding problems such as the hollow first projection in the prior art digging in or occluding and compressing and deforming upward during use.

[0025] As shown in Figures 1 to 4, the auxiliary support portion 121 is formed by the buccal surface 122 (the side adjacent to the patient's buccal side when the shell-shaped orthodontic appliance is attached) or lingual surface 123 (the side adjacent to the patient's lingual side when the shell-shaped orthodontic appliance is attached) of the first projection 12 being either recessed inward or protruding outward. Figure 1 shows an embodiment where the projection is recessed inward, and Figure 4 shows an embodiment where the projection is protruding outward. As shown in Figure 5, regardless of whether the auxiliary support portion 121 is recessed inward or protrudes outward, it forms a height difference H with the surface on which it is located. The advantage of this design is that the shell-shaped orthodontic appliance has a large bending section modulus at the same thickness, and without a height difference, the side surface of the first projection 12 is simply a flat, thin surface that is prone to buckling and collapsing when subjected to pressure. Specifically,

number

[0026] In other embodiments, as shown in Figures 6-7, the cross-sectional shape of the auxiliary support portion 121 in the horizontal plane is polygonal or semicircular. Different cross-sectional shapes result in different deformation resistance of the first projection 12. The trapezoidal shape has the largest bending section modulus, followed by the semicircular shape, and then the V-shape (triangle). However, the trapezoidal auxiliary support portion 121 requires that the side surface of the first projection 12 has a certain length in the mesiocentrifugal direction.

[0027] In some embodiments, auxiliary support portions 121 are also provided on the mesial and / or centrifugal surfaces of the first projection 12, and the auxiliary support portions 121 are formed by the mesial and / or centrifugal surfaces of the first projection 12 being recessed inward or protruding outward in order to improve the bending section modulus of the mesial and / or centrifugal surfaces of the first projection 12.

[0028] In some embodiments, the upper surface of the first projection 12 has an occlusal mark structure that matches with the occlusal surfaces of the opposing teeth at the target occlusal position. Because the occlusal mark structure is a convex-concave structure that matches with the occlusal surfaces of the opposing teeth at the target occlusal position, the first projection 12 can maintain a stable occlusal state with the opposing teeth at the target occlusal position, thereby improving the orthodontic effect. Furthermore, the occlusal mark structure has a positioning function and can guide the patient's mandible to reach the target occlusal position after the shell-shaped orthodontic appliance is fitted.

[0029] In some embodiments, as shown in Figure 5, the width X of the upper surface of the first projection 12 in the buccolingual direction is smaller than the width of the opposing teeth at the corresponding positions in the buccolingual direction. The advantage of such a design is that, during the process of the patient fitting the shell-shaped orthodontic appliance, the upper supporting contour of the first projection 12 can be fully supported by the anatomical surface of the opposing teeth. In some embodiments, when ensuring that the first projection 12 has sufficient width in the buccolingual direction, the width X of the upper surface of the first projection 12 in the buccolingual direction is 0.6 to 0.8 times the width of the opposing teeth at the corresponding positions in the buccolingual direction.

[0030] Similarly, in some embodiments, the width of the lower edge of the first projection 12 in the buccolingual direction is smaller than the width of the tooth at the corresponding position in the buccolingual direction. The advantage of such a design is that, during the process of the patient fitting the shell-shaped orthodontic appliance, the lower support contour of the first projection 12 can be fully supported by the anatomical surface of the corresponding tooth in the jaw where the first projection 12 is located. In some embodiments, when ensuring that the first projection 12 has sufficient width in the buccolingual direction, the width of the lower edge of the first projection 12 in the buccolingual direction is 0.6 to 0.8 times the width of the tooth at the corresponding position in the buccolingual direction.

[0031] In some embodiments, the width X of the upper surface of the first projection 12 in the buccolingual direction is 0.6 to 0.8 times the width of the opposing teeth at the corresponding position in the buccolingual direction, and the width of the lower edge of the first projection 12 in the buccolingual direction is 0.6 to 0.8 times the width of the teeth at the corresponding position in the buccolingual direction. The advantage of such a design is that the upper and lower support contours of the first projection 12 can support simultaneously and together provide stable support.

[0032] In some embodiments, as shown in Figure 8, the first projection 12 is located within the area corresponding to the 4th, 5th, and 6th teeth in the posterior tooth region of the shell-shaped orthodontic appliance. In some embodiments, the first projection 12 covers at least two tooth positions. The length L of the first projection 12 in the mesiodistal direction is between 15 mm and 25 mm. When in use, the first projection 12 can further flatten the patient's Spee curve when treating cases of mandibular retrusion by pushing down the teeth covering the tooth positions in the opposing jaw.

[0033] In some embodiments, as shown in Figure 5, the labial and / or buccal surfaces of the first projection 12 have a plurality of auxiliary support portions 121, with equal distances between the plurality of auxiliary support portions 121. The advantage of such a design is that the support force provided by the upper and lower support contours of the first projection 12 in the occlusal / perpendicular direction is evenly distributed, so that the first projection 12 does not have areas of low support force, and the upper and lower support contours of the first projection 12 do not develop areas of weak support force and deform into weak areas.

[0034] The present invention further includes a shell-shaped dental instrument, specifically, as shown in Figure 9, in some embodiments, the shell-shaped dental instrument includes a first shell-shaped body 10 that at least partially accommodates the maxillary teeth and a second shell-shaped body 20 that at least partially accommodates the mandibular teeth, wherein the occlusal surface of the first shell-shaped body 10 in the posterior tooth region is provided with a first projection 102 that protrudes toward the opposing jaw direction to guide the sagittal movement of the mandible toward the opposing jaw direction, and the occlusal surface of the second shell-shaped body 20 in the posterior tooth region is provided with a first projection 102 that protrudes toward the opposing jaw direction to guide the sagittal movement of the mandible toward the opposing jaw direction A second projection 202 is provided to cooperate with the first projection 102, and the auxiliary support portion 1021 is formed by the buccal surface and / or lingual surface of the first projection 102 being recessed inward or protruding outward. When a shell-shaped dental instrument is attached, the upper and lower edges of the auxiliary support portion 1021 contact the occlusal surfaces of the teeth at their respective positions, generating an auxiliary support force that resists deformation of the first projection 102 in the occlusal direction. When the mesial surface of the first projection 102 and the distal surface of the second projection 202 interact, the mandible moves forward to the target occlusal position.

[0035] In some embodiments, the first projection 102 and the first shell-shaped body 10 are integrally structured, and the second projection 202 and the second shell-shaped body 20 are integrally structured.

[0036] The design of the first shell-shaped body 10 and the auxiliary support portion 1021 on the first projection 102 on the first shell-shaped body 10 in each embodiment of the present application is the same as the design of the auxiliary support portion 121 in the shell-shaped orthodontic appliance of the present application. The second shell-shaped body 20 of the shell-shaped dental appliance in each embodiment of the present application has a plurality of tooth-receiving cavities 11 that enclose all the teeth of the opposing jaw of the jaw to which the first shell-shaped body 10 is attached.

[0037] In some embodiments, the mesial surface of the first projection 102 and the distal surface of the second projection 202 are parallel to each other. As shown in Figure 10, when the mesial surface of the first projection 102 and the distal surface of the second projection 202 are planar, the mesial surface of the first projection 102 or the distal surface of the second projection 202 is provided at an angle to the buccolingual direction at the corresponding position, and the angle α is 30° to 75° or 105° to 150°.

[0038] In other embodiments, as shown in Figure 11, when the mesial surface of the first projection 102 and the centrifugal surface of the second projection 202 are curved surfaces parallel to each other, for example, an auxiliary support portion 1021 is provided on the mesial surface of the first projection 102, and the irregularities of the auxiliary support portion 1021 and the centrifugal surface of the second projection 202 match. In such embodiments, the tangent to the highest point of the mesial surface of the first projection 102 or the tangent to the highest point of the centrifugal surface of the second projection 202 is provided at an angle with the buccolingual direction at the corresponding position, and the angle α is 30° to 75° or 105° to 150°.

[0039] In some embodiments, as shown in Figure 12, the first shell-shaped body 10 has a left first projection 102 and a right first projection 102, and the centrifugal surface of the left first projection 102 and the centrifugal surface of the right first projection 102 are arranged axially with respect to the tooth midline P to P'. The second shell-shaped body 20 has a left second projection 202 and a right second projection 202, and the centrifugal surface of the left second projection 202 and the centrifugal surface of the right second projection 202 are arranged axially with respect to the tooth midline P to P'.

[0040] In some embodiments, as shown in Figure 13, when the first shell-shaped body 10 and the second shell-shaped body 20 are used in combination, the left first projection 102 and the left second projection 202, and the right first projection 102 and the right second projection 202 are in a combined state. The mesial surface of the left first projection 102 and the distal surface of the left second projection 202 are parallel to each other, and the angle α1 between the buccolingual direction at the position corresponding to the mesial surface of the left first projection 102 and the distal surface of the left second projection 202 is 30° to 75°. The mesial surface of the right first projection 102 and the distal surface of the right second projection 202 are parallel to each other, and the angle α2 between the buccolingual direction at the position corresponding to the mesial surface of the right first projection 102 and the distal surface of the right second projection 202 is 105° to 150°. The advantage of this design is that the inclination angles of the left and right first projections 102 and second projections 202 are matched, allowing the left and right movement of the mandible to be restricted by the first and second projections 102 and 202. This achieves the function of mandibular guidance and position restriction, preventing lateral displacement during orthodontic treatment and providing excellent positioning.

[0041] The directions "left" and "right" in this application refer only to the position in the drawings and do not indicate the actual position of use of the shell-shaped dental instrument.

[0042] In some embodiments, as shown in Figure 12, the second projection 202 is positioned to correspond to the fourth tooth. The length of the second projection 202 in the mesiodistal direction is equal to the length of the corresponding fourth tooth in the mesiodistal direction. Guiding the mandible forward using the shell-shaped dental instrument in this application is achieved by the cooperative action of the first projection 102 and the second projection 202, with the second projection 202 primarily acting as the force-receiving point for the forward movement of the mandible. Compared to covering only the position of the fourth tooth with the size of the second projection 202, a smaller size allows for greater mandibular mobility and also avoids deformation of the second projection 202 when subjected to force.

[0043] In some embodiments, as shown in Figures 9 to 12, to similarly improve the support force of the second projection 202 in the occlusal or vertical direction, at least one surface of the second projection 202, which is the labial, buccal, mesial, or distal surface, has an auxiliary support portion 1021, which is formed by the surface on which it is located being recessed inward or protruding outward, and when a shell-shaped dental instrument is attached, the upper and lower edges of the auxiliary support portion 1021 contact the occlusal surface of the tooth at their respective positions, generating an auxiliary support force that resists deformation of the second projection 202 in the occlusal direction.

[0044] In some embodiments, the length of the first projection 102 in the mesiodistal direction is greater than the length of the second projection 202 in the mesiodistal direction, and in order to more uniformly stabilize the support force of the first projection 102 and the second projection 202 in the occlusal direction during use of the shell-shaped dental instrument, the maximum width of the auxiliary support in the mesiodistal direction of the first projection is greater than the maximum width of the auxiliary support in the mesiodistal direction of the second projection.

[0045] In some embodiments, the occlusal surfaces of the first projection 102 and the second projection 202 have an occlusal mark structure that matches each other with the occlusal surfaces of the opposing teeth at the target occlusal position.

[0046] The present invention further includes an orthodontic system, as shown in Figure 14, which includes N sets of shell-shaped dental appliances, each of which corresponds to N sequential orthodontic steps, and each of the N sets of shell-shaped dental appliances can reposition a tooth from the initial layout of the corresponding orthodontic step to the target layout of the corresponding orthodontic step, and the N sets of shell-shaped dental appliances include at least M sets of shell-shaped dental appliances as described in any one of the above embodiments, where M is 2 or more and less than N. The sagittal positional relationship of the upper and lower jaws at the target occlusal position corresponding to the M sets of shell-shaped dental appliances is the same.

[0047] In some embodiments, the projection height of the first projection 102 and the projection height of the second projection 202 in the opposing jaw direction, provided on shell-shaped dental appliances corresponding to different orthodontic stages, are set in relation to the orthodontic stage.

[0048] As shown in Figure 14, the projection heights of the first projection 102 and the second projection 202 on the M-set shell-shaped dental appliance in the direction of the opposing jaw gradually decrease as the orthodontic process progresses. The advantage of this is that the dentition is gradually flattened to the target state. In some embodiments, referring to at least two sets of shell-shaped dental appliances from the M-set shell-shaped dental appliances shown in the figure, the shell-shaped dental appliance 200 is a shell-shaped dental appliance that needs to be used in a later orthodontic step than the shell-shaped dental appliance 100, and the heights H1 of the first projection 102 and H2 of the second projection 202 on the shell-shaped dental appliance 200 are smaller than the heights H1 of the first projection 102 and H2 of the second projection 202 on the shell-shaped dental appliance 100.

[0049] This application further discloses a method for producing a shell-shaped dental instrument, as shown in Figure 15.

[0050] In step 101, the sagittal positional relationship of the upper and lower jaws at the final orthodontic position is obtained based on the orthodontic plan.

[0051] In step 102, the geometric shapes of the first and second shell-shaped bodies are determined. The occlusal surface of the first shell-shaped body in the posterior tooth region is provided with a first projection that guides the sagittal movement of the mandible toward the opposing jaw. The occlusal surface of the second shell-shaped body in the posterior tooth region is provided with a second projection that cooperates with the sagittal movement of the mandible toward the opposing jaw. The labial and / or buccal surfaces of the first projection are recessed inward or protrude outward to form an auxiliary support. When the shell-shaped dental appliance is fitted, the upper and lower edges of the auxiliary support contact the occlusal surfaces of the teeth at their corresponding positions, generating an auxiliary support force that resists deformation of the first projection in the occlusal direction. When the mesial surface of the first projection and the distal surface of the second projection interact, the mandible moves forward to the target occlusal position. The target occlusal position is the final orthodontic position obtained based on the orthodontic plan.

[0052] In step 103, shell-shaped dental instruments are manufactured, with the first and second shell-shaped bodies being produced based on their geometric shapes. Based on the geometric shapes of the first and second shell-shaped bodies, the first and second orthodontic instruments can be directly obtained by additive manufacturing. Additive manufacturing, also known as 3D printing, is a manufacturing technique that combines computer-aided design, material processing, and molding technologies. Based on a digital model file, software and numerical control systems deposit specialized metallic materials, non-metallic materials, and biomedical materials layer by layer using methods such as extrusion, sintering, melting, photocuring, and spraying to produce physical articles.

[0053] Alternatively, as shown in Figure 16, step 102 is the step of determining the geometric models of the first projection and the second projection in the target digital dental model. In some embodiments, an initial dental model is obtained from data from a dental scanner, and the first and second projections are designed on the occlusal surface in the posterior tooth region of the initial dental model to generate the first digital dental model 300 and the second digital dental model 400. Next, solid models of the first digital dental model 300 and the second digital dental model 400 are fabricated by additive manufacturing, and based on the solid models of the first digital dental model 300 and the second digital dental model 400, the first and second shell-shaped bodies are directly manufactured by a hot-press method.

[0054] Furthermore, each module in this embodiment is a logic module, and in actual application, a single logic unit may be a single physical unit, a part of a single physical unit, or a combination of multiple physical units. Also, in order to emphasize the novelty of this application, this embodiment does not introduce units that are not closely related to the means of solving the technical problems of this application, but this embodiment does not imply that other units do not exist.

[0055] Furthermore, as shown in Figure 17, the electronic device according to the present application includes at least one processor 401 and a memory 402 that is communicably connected to the at least one processor 401. The memory 402 stores instructions that can be executed by the at least one processor 401, and when an instruction is executed by the at least one processor 401, the at least one processor 401 can perform a method for producing a shell-shaped dental instrument.

[0056] The memory and processor are connected by a bus, which includes any number of interconnected buses and bridges, connecting one or more processors and memory circuits of various types. The bus may also connect various other circuits, such as peripherals, regulators, and power management circuits, all of which are known in the art and are therefore not described here. The bus interface provides an interface between the bus and the transceiver. The transceiver may be a single component or multiple components, such as multiple receivers and transmitters, and is provided as a unit that communicates with various other devices on a transmission medium. Data processed by the processor is transmitted over a wireless medium by an antenna, which in turn receives the data and transmits it back to the processor.

[0057] The processor is responsible for bus management and normal processing, and can also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. Memory may store data used by the processor when it performs its operations.

[0058] This application further relates to a computer-readable storage medium in which a computer program is stored. When the computer program is executed by a processor, the above embodiment of the method is realized.

[0059] As those skilled in the art will understand, the implementation of all or part of the steps in the methods of the above embodiments can be completed by instructing the relevant hardware by program, which is stored in a storage medium and includes several instructions for causing a device (which may be a single-chip microcomputer, or a chip) or processor to perform all or part of the steps of the methods of each embodiment of the present application. The aforementioned storage medium includes a variety of media capable of storing program code, such as U disks, removable hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0060] Furthermore, the above embodiments can be freely combined as needed to form various new embodiments, provided that no contradictions arise. Any embodiments formed by such combinations are included within the scope of protection of this application, and for the sake of brevity, their explanation is omitted here.

[0061] The above description is merely a preferred embodiment of the present application, and it should be noted that a person skilled in the art can make several further improvements and modifications without departing from the principles of the present application, and these improvements and modifications should also be included within the scope of protection of the present application.

[0062] Similarly, although the above description is merely a specific embodiment of the present application, the scope of protection of this application is not limited thereto. Any changes or substitutions that a person skilled in the art could easily conceive of within the scope of the technical information disclosed herein should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims described herein.

Claims

1. It includes a shell-shaped body that houses the teeth, The aforementioned shell-shaped body has an integrally molded structure. On the occlusal surface of the shell-shaped body in the posterior tooth region, a first projection is provided that protrudes toward the opposing jaw direction to reconstruct the upper and lower jaw occlusal position. The first projection is provided with an auxiliary support portion that lengthens the upper support contour edge and the lower support contour edge of the first projection. The auxiliary support portion is formed by the buccal surface and / or lingual surface of the first projection being recessed inward or protruding outward, and penetrates the upper support contour and lower support contour of the first projection. When the shell-shaped body is attached, the upper and lower support contours of the first projection are supported by the occlusal surfaces of the teeth at their corresponding positions, generating an auxiliary support force that resists deformation of the first projection in the occlusal direction. Shell-shaped orthodontic appliance.

2. The cross-sectional shape of the auxiliary support portion in the horizontal plane is polygonal. The shell-shaped orthodontic appliance according to claim 1.

3. The cross-sectional shape of the auxiliary support portion in the horizontal plane is triangular or trapezoidal. The shell-shaped orthodontic appliance according to claim 2.

4. The cross-sectional shape of the auxiliary support portion in the horizontal plane is semicircular. The shell-shaped orthodontic appliance according to claim 1.

5. The auxiliary support portion is formed by the mesial surface and / or distal surface of the first projection being recessed inward or protruding outward. A shell-shaped orthodontic appliance according to any one of claims 1 to 4.

6. The upper surface of the first projection has an occlusal mark structure that matches with the occlusal surfaces of the opposing teeth at the target occlusal position. A shell-shaped orthodontic appliance according to any one of claims 1 to 5.

7. The width of the upper surface of the first projection in the buccolingual direction is smaller than the width of the opposing teeth at the corresponding position in the buccolingual direction. A shell-shaped orthodontic appliance according to any one of claims 1 to 6.

8. The width of the upper surface of the first projection in the buccolingual direction is 0.6 to 0.8 times the width of the opposing teeth at the corresponding position in the buccolingual direction. The shell-shaped orthodontic appliance according to claim 7.

9. The width of the lower edge of the first projection in the buccolingual direction is smaller than the width of the tooth at the corresponding position in the buccolingual direction. A shell-shaped orthodontic appliance according to any one of claims 1 to 8.

10. The width of the lower edge of the first projection in the buccolingual direction is 0.6 to 0.8 times the width of the tooth at the corresponding position in the buccolingual direction. The shell-shaped orthodontic appliance according to claim 9.

11. The first projection is located within the region corresponding to teeth number 4, 5, and 6. A shell-shaped orthodontic appliance according to any one of claims 1 to 10.

12. The first projection covers at least two tooth positions. The shell-shaped orthodontic appliance according to claim 11.

13. The length of the first projection in the mesiodistal direction is 15 mm or more and 25 mm or less. The shell-shaped orthodontic appliance according to claim 12.

14. The labial and / or buccal surfaces of the first projection have a plurality of auxiliary support parts, and the distance between the plurality of auxiliary support parts is equal. A shell-shaped orthodontic appliance according to any one of claims 1 to 13.

15. A shell-shaped dental instrument, It includes a first shell-shaped body that at least partially accommodates the maxillary teeth and a second shell-shaped body that at least partially accommodates the mandibular teeth, The first shell-shaped body is a shell-shaped orthodontic appliance according to any one of claims 1 to 14, On the occlusal surface of the second shell-shaped body in the posterior tooth region, a second projection is provided that protrudes toward the opposing jaw direction, and in cooperation with the first projection of the first shell-shaped body, moves the mandible in the sagittal direction. When the shell-shaped dental appliance is attached, if the mesial surface of the first projection and the distal surface of the second projection interact, the mandible moves forward to the target occlusal position. Shell-shaped dental instrument.

16. The first projection and the first shell-shaped body are integrally structured, and the second projection and the second shell-shaped body are integrally structured. The shell-shaped dental instrument according to claim 15.

17. The mesial surface of the first projection and the distal surface of the second projection are parallel to each other. The shell-shaped dental instrument according to claim 15 or 16.

18. When the mesial surface of the first projection and the distal surface of the second projection are planar, the mesial surface of the first projection or the distal surface of the second projection is provided at an angle with respect to the buccolingual direction at the corresponding position, and the angle is 30° to 75° or 105° to 150°. The shell-shaped dental instrument according to claim 17.

19. When the mesial surface of the first projection and the distal surface of the second projection are curved surfaces, the tangent to the highest point of the mesial surface of the first projection or the tangent to the highest point of the distal surface of the second projection is provided at an angle with the buccolingual direction at the corresponding position, and the angle is 30° to 75° or 105° to 150°. The shell-shaped dental instrument according to claim 17.

20. The first shell-shaped body has a first projection on the left side and a first projection on the right side, and the distal surface of the first projection on the left side and the distal surface of the first projection on the right side are arranged axially symmetric with respect to the tooth midline. A shell-shaped dental instrument according to any one of claims 15 to 19.

21. The second shell-shaped body has a second projection on the left side and a second projection on the right side, and the distal surface of the second projection on the left side and the distal surface of the second projection on the right side are arranged axially symmetric with respect to the tooth midline. A shell-shaped dental instrument according to any one of claims 15 to 20.

22. The second projection is located in a position corresponding to the fourth tooth. A shell-shaped dental instrument according to any one of claims 15 to 21.

23. The length of the second projection in the mesiodistal direction is equal to the length of the corresponding fourth tooth in the mesiodistal direction. The shell-shaped dental instrument according to claim 22.

24. The labial, buccal, mesial, or distal surfaces of the second projection have auxiliary support portions, which are formed by the surface on which they are located being recessed inward or protruding outward. When the shell-shaped dental instrument is attached, the upper and lower edges of the auxiliary support portion contact the occlusal surface of the tooth at their respective positions, generating an auxiliary support force that resists deformation of the second projection in the occlusal direction. A shell-shaped dental instrument according to any one of claims 15 to 23.

25. The maximum width of the auxiliary support portion in the mesiocentral direction of the first projection is greater than the maximum width of the auxiliary support portion in the mesiocentral direction of the second projection. The shell-shaped dental instrument according to claim 24.

26. The occlusal surface of the second projection has an occlusal mark structure that matches with the occlusal surface of the opposing jaw teeth at the target occlusal position. A shell-shaped dental instrument according to any one of claims 15 to 25.

27. Includes N-type shell-shaped dental instruments, Each of the N sets of shell-shaped dental instruments corresponds to N sequential orthodontic steps. Each of the N sets of shell-shaped dental instruments allows for the repositioning of a tooth from the initial layout of the corresponding orthodontic step to the target layout of the corresponding orthodontic step. The aforementioned N set of shell-shaped dental instruments includes at least one of the shell-shaped dental instruments described in any one of claims 15 to 26 of the M set, where M is 2 or more and less than N. Orthodontic system.

28. The height of the first projection and the height of the second projection in the opposing jaw direction, provided on shell-shaped dental appliances corresponding to different orthodontic stages, are set in relation to the orthodontic stage. The orthodontic system according to claim 27.

29. The height of the first and second projections on the shell-shaped dental appliance of the M group, in the direction of the opposing jaw, gradually decreases as the orthodontic process progresses. The orthodontic system according to claim 27 or 28.

30. The sagittal positional relationship of the upper and lower jaws at the target occlusal position corresponding to the shell-shaped dental appliances of group M is the same. The orthodontic system according to any one of claims 27 to 29.

31. A method for producing a shell-shaped dental instrument, The steps include obtaining the sagittal positional relationship of the upper and lower jaws at the final orthodontic position based on the orthodontic plan, A step of determining the geometric shapes of a first shell-shaped body and a second shell-shaped body, wherein the occlusal surface of the geometric shape of the first shell-shaped body in the posterior tooth region is provided with a first projection that protrudes toward the opposing jaw direction to guide the sagittal movement of the mandible, and the occlusal surface of the geometric shape of the second shell-shaped body in the posterior tooth region is provided with a second projection that protrudes toward the opposing jaw direction to cooperate with the sagittal movement of the mandible, and an auxiliary support portion is formed by the labial and / or buccal surfaces of the first projection being recessed inward or protruding outward, and when the shell-shaped dental appliance is attached, the upper and lower edges of the auxiliary support portion are supported by the occlusal surfaces of the teeth at corresponding positions, generating an auxiliary support force that resists deformation of the first projection in the occlusal direction, and when the mesial surface of the first projection and the distal surface of the second projection interact, the mandible moves forward to a target occlusal position, and the target occlusal position is the final orthodontic position obtained based on the orthodontic plan, A step of manufacturing a shell-shaped dental instrument, comprising the steps of manufacturing the first shell-shaped body and the second shell-shaped body, respectively, based on the geometric shapes of the first shell-shaped body and the second shell-shaped body, A method for manufacturing shell-shaped dental instruments.

32. The steps for manufacturing a shell-shaped dental instrument include steps for manufacturing by additive manufacturing or hot-pressure manufacturing. A method for producing a shell-shaped dental instrument according to claim 31.

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